Hot water hot enough

Strictly following the advice in 'The little book of energy' produced by the Home Heat Helpline (0800 33 66 99) which I had picked up at Sarah Boyack's Energy Event (see blog post of 23 March) I turned down the thermostat on my hot water cylinder that tells my gas boiler whether it needs heat or not down from 62 degrees C to 60 degrees. Still seems hot enough.